Abstract
This study reports the influence of Ni content on the structure and wear resistance of (Ti, Cr)C-based coatings. The (Ti,Cr)C-based composite powders, cladded with 18, 25 and 33 wt.% Ni were used to deposite coatings on stainless steel substrate by detonation spraying technique. The thickness of the coatings reaches 350-500 μm, the porosity is about 2%. The (Ti,Cr)C-Ni coatings have a dense lamellar microstructure with uniform distribution of refractory particles and metal binder. The wear behavior of the coatings against steel ring were investigated by dry sliding wear tests. Depending on the Ni content the sliding wear loss of the (Ti,Cr)C-based coatings was 1,2-2 times less than that of (Ti,Cr)C detonation-sprayed coating. The investigation of worn surfaces revealed that the wear mechanism of the (Ti,Cr)C-based coatings with Ni content increase changes from abrasive to oxidative.
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